D. Cullen

Epidural Morphine Provides Postoperative Pain Relief in Peripheral Vascular and Orthopedic Surgical Patients: A Dose—Response Study

B. Covino, M. Concepcion, P. Allen, 1986, Anesthesia and analgesia.

Cardiovascular Effects of Halothane in Man

N. T. Smith, E. Eger, R. Stoelting, 1970, Anesthesiology.